I think you have it bang on Beau. Presume you have a nice powerful saw for oversize ringing?
One small thing I might change, the trailer system. I would prefer to log up on a concrete surface with a solid bulkhead back ( If I had an area like this) and scoop up bucket loads with your articulated loader and have those right at my side by the splitter. I know you have the trailer right there as well but I'm sure there is always that little bit of awkward stretching and pulling that needs to be done to fish rings out of the corners, etc to haul across to the splitter table. This system might also eliminate jumping up and down off the trailer as you saw up (presuming you don't operate the saw from the side?).

I have been busy weekends of recent cutting out new rides through a boggy wild woodland, getting through leggy birch and rowan mostly. Here's a few videos detailing the process from standing tree to split log. Please excuse the crappy editing, grainy footage, poor sound quality in these plus the double speed effect. https://youtu.be/ag4fHC4LOs4
https://youtu.be/Hjf6VotN7Kw

(presume that's 10'' high rings not diameter) About 5 seconds on a pto version of the magik 13. That's picking the log up from table at waist height, splitting and next log in hand again.
I have a video somewhere.

Duals, cheaper option, plus easy to undo as it makes steering a pig especially with the front weights. Generally a smaller diameter tyre is used on non-power assist tractors I believe so you don't get the extra drag when steering but do get the lift required when you start to cut the ground. I tried 13" wheels from a berlingo van but fiddly to bolt on and off.

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